Optimal Relay Station Placement in Broadband Wireless Access Networks

—To satisfy the stringent requirement of capacity enhancement in wireless networks, cooperative relaying is envisioned as one of the most effective solutions. In this paper, we study the capacity enhancement problem by way of Relay Stations (RSs) placement to achieve an efficient and scalable design in broadband wireless access networks. To fully exploit the performance benefits of cooperative relaying, we develop an optimization framework to maximize the capacity as well as to meet the minimal traffic demand by each Subscriber Station (SS). In specific, the problem of joint RS placement and bandwidth allocation is formulated into a mixedinteger nonlinear program. We reformulate it into an integer linear program which is solvable by CPLEX. To avoid exponential computation time, a heuristic algorithm is proposed to efficiently solve the formulated problem. Numerical analysis is conducted through case studies to demonstrate the performance gain of cooperative relaying and the compariso...

• Type: Journal
• Year: 2010
• Where: TMC
• Authors: Bin Lin, Pin-Han Ho, Liang-Liang Xie, Xuemin (Sherman) Shen, János Tapolcai
• Keywords: Capacity Enhancement, Capacity Enhancement Problem, Heuristic Algorithm, TMC 2010